i have a request if you are not done,
i watched your hard surface tutorial, but one thing you didnt explain was
when the mesh becomes really dense to support all the hard edges on curved surfaces,
how do you align all the vertices, do you do it by hand? every single vertices?
or do you have some tool to help you?

and if you do it by hand how do you know how much density you can handle?
i always seem to hit some spot where too many vertices becomes impossible to align

He means, you start adding so many edge loops along a curve it can start to pinch/warp in places to which I'd say, yeh I manually fix stuff. You have to, unless it's a straight line and you can use the x,y,z snap tools on your selection.

Sorry about tutorial delay. Just lost a bit of time last couple of days and don't wanna sacrifice personal modeling time.